diff --git a/toml/toml.hpp b/toml/toml.hpp
index decd8b6..eb47307 100644
--- a/toml/toml.hpp
+++ b/toml/toml.hpp
@@ -724,13 +724,36 @@ value::cast()
 
 /* -------------------------------------------------------------------------- */
 
-// template<typename T, toml::value_t vT = toml::detail::check_type<T>()>
-// inline toml::value to_toml(T&& x)
-// {
-//     return detail::to_toml_impl<T, vT>::invoke(std::forward<T>(x));
-// }
+template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
+         typename std::enable_if<(vT != toml::value_t::Unknown &&
+         vT != value_t::Empty), std::nullptr_t>::type = nullptr>
+inline toml::value to_toml(T&& x)
+{
+    return toml::value(std::forward<T>(x));
+}
 
+template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
+         typename std::enable_if<(vT == toml::value_t::Unknown) &&
+         (!toml::detail::is_map<T>::value) &&
+         toml::detail::is_container<T>::value, std::nullptr_t>::type = nullptr>
+inline toml::value to_toml(T&& x)
+{
+    toml::Array tmp; tmp.reserve(std::distance(std::begin(x), std::end(x)));
+    for(auto iter = std::begin(x); iter != std::end(x); ++iter)
+        tmp.emplace_back(*iter);
+    return toml::value(std::move(tmp));
+}
 
+template<typename T, toml::value_t vT = toml::detail::check_type<T>(),
+         typename std::enable_if<(vT == toml::value_t::Unknown) &&
+         toml::detail::is_map<T>::value, std::nullptr_t>::type = nullptr>
+inline toml::value to_toml(T&& x)
+{
+    toml::Table tmp;
+    for(auto iter = std::begin(x); iter != std::end(x); ++iter)
+        tmp.emplace(iter->first, to_toml(iter->second));
+    return toml::value(std::move(tmp));
+}
 
 }// toml
 #endif// TOML_FOR_MODERN_CPP